/*
 * The Unified Mapping Platform (JUMP) is an extensible, interactive GUI
 * for visualizing and manipulating spatial features with geometry and attributes.
 *
 * Copyright (C) 2003 Vivid Solutions
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * For more information, contact:
 *
 * Vivid Solutions
 * Suite #1A
 * 2328 Government Street
 * Victoria BC  V8T 5G5
 * Canada
 *
 * (250)385-6040
 * www.vividsolutions.com
 */

package com.vividsolutions.jump.qa.diff;

import com.vividsolutions.jts.geom.*;
import com.vividsolutions.jts.index.*;
import com.vividsolutions.jts.index.quadtree.Quadtree;
import com.vividsolutions.jump.feature.*;
import java.util.*;
import com.vividsolutions.jump.util.CoordinateArrays;

public class SegmentIndex {

  private SpatialIndex segIndex = new Quadtree();
  private Envelope itemEnv = new Envelope();

  public SegmentIndex(FeatureCollection fc)
  {
    for (Iterator i = fc.iterator(); i.hasNext(); ) {
      Feature f = (Feature) i.next();
      add(f.getGeometry());
    }
  }

  public void add(Geometry geom)
  {
    // don't need to worry about orienting polygons
    add(CoordinateArrays.toCoordinateArrays(geom, false));
  }
  public void add(LineString line)
  {
    add(line.getCoordinates());
  }
  public void add(List coordArrays)
  {
    for (Iterator i = coordArrays.iterator(); i.hasNext(); ) {
      add((Coordinate[]) i.next());
    }
  }
  public void add(Coordinate[] coord)
  {
    for (int i = 0; i < coord.length - 1; i++) {
      LineSegment lineseg = new LineSegment(coord[i], coord[i + 1]);
      lineseg.normalize();

      itemEnv.init(lineseg.p0, lineseg.p1);
      segIndex.insert(itemEnv, lineseg);
    }
  }

  public List query(Envelope env)
  {
    return segIndex.query(env);
  }

}